Wave Optics-I Physics Test Series NEET 2020

Test Preparation on Wave Optics-I-Physics Test Series For NEET 2020

1.

The waves of wavelength 5900 oA emitted by any atom or molecule must have some finite total length which is known as coherence length. For sodium light, this length is 2.4 cm. The number of oscillations in this length will be

14.068 x108
24.068 x104
34.068 x106
44.068 x105

2.

1A
2B
3C
4D

3.

The phenomenon of interference is shown by

1Longitudinal mechanical waves only
2Transverse mechanical waves only
3Electromagnetic waves only
4All the above types of waves

4.

Two coherent monochromatic light beams of intensities I and 4I are superposed. The maximum and minimum possible intensities in the resulting beam are

15I and I
25I and 3I
39I and I
49I and 3I

5.

Light appears to travel in straight lines since

1It is not absorbed by the atmosphere
2It is reflected by the atmosphere
3Its wavelength is very small
4Its velocity is very large

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